Senescent fibroblasts and chemoresistance in colorectal cancer: an abstract
In this abstract, senescent cancer-associated fibroblasts in colorectal cancer correlated with poorer chemotherapy response and prognosis; in preclinical models they mediated resistance via SASP factors, triggered by macrophage IL1B through IL1R1. [1]
Automatic summary · not editorially reviewed
The key findings
In colorectal cancer, sCAF abundance strongly correlated with impaired chemotherapy responsiveness and poor prognosis. [1]
In preclinical models, sCAFs mediated chemoresistance through SASP, with IL6 and CXCL12 as key contributors. [1]
Macrophage-derived IL1B triggered CAF senescence via IL1R1, and fibroblast-specific Il1r1 knockout mice supported this pathway. [1]
The source at a glance
- Study type / format
- Abstract of a preclinical and patient-data study
- Population / context
- People with colorectal cancer (as described) and preclinical tumor models, including mice and patient-derived organoids.
- Summary based on
- Study abstract
- Original publication
- October 1, 2026
Senescent CAFs linked to chemoresistance in colorectal cancer
The abstract describes a machine learning model built on single-cell RNA sequencing data to identify senescent cancer-associated fibroblasts (sCAFs). In colorectal cancer, the abundance of these sCAFs strongly correlated with impaired chemotherapy responsiveness and poor prognosis. This is an association in patient data as described; the abstract does not report how many patients were studied or how response was measured.
Supporting source [1]
Preclinical models: SASP factors IL6 and CXCL12
In preclinical models — subcutaneous tumors, patient-derived organoids, organoid xenografts and orthotopic tumors — sCAFs mediated chemoresistance through the senescence-associated secretory phenotype (SASP), with IL6 and CXCL12 named as key contributors. These are laboratory and animal results, not evidence of benefit in human lifespan or human treatment outcomes.
Supporting source [1]
Macrophage IL1B triggers CAF senescence via IL1R1
Macrophage-derived IL1B triggered CAF senescence through the IL1B-IL1R1 interaction, promoting sCAF accumulation. Spatial transcriptomics and multiplex immunohistochemistry showed IL1B+ macrophages and IL1R1+ sCAFs colocalized in the tumor stroma. Fibroblast-specific Il1r1 knockout mice further supported that this signaling leads to SASP-driven chemotherapy resistance. The abstract suggests targeting the IL1B-IL1R1 axis as a possible strategy; this is a proposal, not a validated treatment.
Supporting source [1]
How to interpret this
This is an abstract; the full text was not reviewed. Patient sample size, follow-up and how chemotherapy response was measured are not reported. Preclinical model results do not establish human treatment benefit, and targeting IL1B-IL1R1 is a proposal, not a validated therapy.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Yang S, Chen Y, Liu S, Zuo A, Ba Y, Zhang Y, Liu B, Zhang C, Xu H, Luo P, Cheng Q, Weng S, Liu L, Zhou X, Pan T, Ming R, Ning J, Hu X, Han X, Wang F, Deng J, Liu Z. · europepmc.org · October 1, 2026